Table of Contents
Application
DDS450 series single-phase electronic watt-hour meters adopt an ultra large digital energy measurement chip and SMT technology; its key components are selected from international brand industrial class, to greatly improve the reliability and service life of the product. The product presents a graceful appearance, firm structure, good performance, and long service life. Besides, it has the function of anti-electricity theft, and is suitable for measuring AC single-phase active energy of reference frequency 50Hz or 60Hz.
Normal working conditions and installation conditions
1. Specified working temperature: -25℃~55℃；
2. Utmost working temperature: -25℃~60℃；
3. Relative humidity: ≤85% (at environmental temperature 23℃)
4. There shall be no harmful substance causing corrosion in the air.
Main Technical Data
1. Working voltage: 0.9Un-1.1Un;
2. Power consumption: less than 2W/10VA;
3. Executive standard: GB/T 17215.321-2008；
4. Good temperature performance: the error shall not exceed the accuracy range within the temperature range -25℃~55℃;
5. Good light-load performance; the instrument has a fine accuracy class at ultra-light load.
6. High accuracy of actual online measuring, high reliability, long service life;
7. Simple installation and operation; the installation position can’t be affected by anything.
8. Strong overload capability; the meter overload ability can reach above 6 times within the accuracy class.
9. Strong ability of transportation resistance; the instrument can’t cause the change of error under various normal transportation conditions, users don’t need to adjust it after opening the box.
External And Installation Size
